Electric door-opener



(No Model.) 2 Sheets-Sheet 1.

R. J. WARD. ELECTRIC 900R OPENER.

No. 457,906. Patented Aug. 18, 1891.

2 Sheets -Sheet 2.

(No Model.)

B J WARD ELEGTRIG DOOR OPENER.

No. 457,906. Patented Aug. 18,1891.

UNITED STATES ATENT FFICE.

RICHARD J. WARD, OF BROOKLYN, NE\V YORK.

ELECTRIC DOOR-OPENER.

' SPECIFICATION formingpart of Letters Patent No. 457,906, dated August18, 1891.

Application filed September 15, 1890. Serial No. 365,080. (No model.)

To aZZ whom it may concern.-

Be it known that I, RICHARD J. WARD, a citizen of the United States, anda resident of Brooklyn, county of Kings, and State of New York, haveinvented certain new and useful Improvements in Electric Door-Openers,of which the following is a specification.

The object of the invention is to provide simplicity of mechanicalconstruction and greater efficiency of operation.

The invention relates, principally, to two features, the one being theelectro-magnetic releasing device and the other a safety retainingmechanism. In locks in present use an expert can so shake the door as tovibrate the delicately-movable armature in such a manner as to releasethe latch. By the second part of my invention this difficulty isremoved.

The invention is described in every detail by reference to theaccompanying drawings.

Figure 1 is a partially-sectional view of a door-frame provided with theelectric dooropener, which is shown also partially in section. Fig. 2 isa view of the opposite side from that shown in Fig. 1. Fig. 3 is a sideor rectangular view of Fig. 2 or Fig. 1. Fig. 4 is a cross-section ofFig. 2 or Fig. 3 at the line X. Fig. 5 is a view of a portion of thelook by itself, showing plainly certain features not prominently shownin the other figures, said figure being a view of the lock as seen frombelow. Fig. 6 shows the parts of Fig. 5 in a position during operation.

The device embodying my invention consists of the combination of acasing formed of two parts-the angle-piece a, of iron, and theangle-piece b, of brassa magnet 0, whose yoke a is formed of a part ofthe angle-piece a, an armature d for said magnet, pivoted at its endsand within inductive distance of said magnet, the axis of the armaturelying in a plane perpendicular to the plane of the axes of the limbs ofsaid magnet, a retractile spring e, tending to oppose the attractiveforce of said magnet, a second magnet 0, whose armature cl has a hook f,which retains the armature d in its normal condition until the currentis passed through the magnets, the said armature (1 being pivoted at apoint g, which is between the armature (Z and the magnet o, a latch h,against which the nose of the door the lever 91 and latch h.

presses in the direction of the arrow, a projection t' on one side ofsaid latch and provided with a surface j, which is in aplaneapproximately parallel to the plane of said latch, a projection 11,projecting beyond said pron, whose axis is parallel to that'of the latchh and which is provided on its shorter arm with a surface m, normallycoincident with the surface j, which terminates at a line 0 on thesurface m, said line lying outside of the imaginary line joining theaxes of the latch hand lever 07., a steel tip 19, secured to the longerarm of said lever n and pressing upon the edge of the armature d, whichis provided with a hole q for the entrance of the tip 19 when thearmature is released, and a retractile spring r, joined to the pins 3and 8, respectively, on the longer arm of lever n and on the latch h.

surfaces j and m upon the shorter arm of the lever 12. The spring 1'retains the surfaces j and in normally in contact with each other. Theforce of the nose tends to rotate the lever n, which resists until thearmatured is attracted by the magnet c, which occurs when the electriccurrent is passed through both magnets. The hookf prevents the armaturecl from being shaken in such a manner as to release the tip 13; but whenthe current is passed through both magnets the hook f releases thearmature and the armature releases The line 0 being so near the plane ofthe axes of the latch h and lever 92, the leverage of the motive latchis so small as to effect a secure locking of said latch. As the latch ismoving, the line 0 gradually moves away from the. line joining the saidaxes, thereby allowing more and more purchase for the force of the noserepresented by the arrow.

The magnet 0 need be but very small compared with the magnet o, becauseonly the slightest force is necessary to move the hook f. The same shakeof the door cannot release both the hook from the armature d and thearmature d from the tip p, perhaps because there would have to be twomotions simultaneously at right angles to each other, which isimpossible. A retractile spring 0 is provided for the armature d. Themagnets o jection i at one edge of said surface j, a lever Theprojection e rests at right angles to the and c are at right angles toeach other, and so are their armatures d and d.

The longer end of the lever 91 presses upon the armature d substantiallyperpendicular to the axes of the latter, whereby the force of the noseagainst the latch is effectually reslsted.

I claim as my invention 1. The combination, with the armature,electro-magnet, and latch of an electric dooropener, of a lever whoseshorter arm has a plane surface normally coincident with a similarsurface on said latch and parallel to the planes of the said latch andlever and whose longer arm presses upon said armature in a dlrectionsubstantially perpendicular to the arms of said armature.

2. An electric door-opener consisting of the combination of a magnet,a-pivoted armature therefor provided with a hole q, a pivoted'leverwhose longer arm presses upon said armature toward said hole, and alatchengaging with the shorter arm of said'lever.

3. The combination, with the armature and latch of an electricdoor-opener, of a lever whose shorter arm has a plane surface normallycoincident with a similar surface on said latch and perpendicular to theplanes of said latch and lever and Whose longer arm presses upon saidarmature in a direction substantially perpendicular to the axis of saidarmature, and a second magnet whose armature engages with saidfirst-named armature.

I11 testimony that I claim the foregoing as my invention I have signedmy name, in presence of two witnesses, this 10th day of September, 1890.

RICHARD J. XVARD."

Witnesses:

W. P. J ONES, CHAS. E. LITTELL.

